2. Reactionary Hemorrhage: Bleeding occurring within the first 24 hours called reactionary hemorrhage. This hemorrhage is usually due to:
- Wearing off effect of adrenaline used in infiltration.
- Slipping of ligature.
- Rise of blood pressure post-operative.
- Dislodgement of a blood clot from the lumen of the vessel.
3. Anesthesia complications.
4. Trauma: Damage to lips, teeth, gums, posterior pharyngeal wall, uvula and dislocation of temporomandibular joint may occur.